There are different opinions about the position of Tian Dan in ancient books and qigong experts. According to Huang Tingjing, there is a Huang Ting (stomach) in the abdomen, with related elements below it, a secluded spot (kidney) behind it, and a life gate in front of it, which is actually one inch and three points in the navel. The reason why Dantian has become the most important way to practice Qigong is because we should pay attention to this place, guide our minds to concentrate during the treatment, so that our brains can get a full rest, adjust our breathing, strengthen our bodies and enhance the activities of internal organs. We know that only when our brains and kidneys are healthy can we get rid of all diseases with sufficient qi. Practicing to protect the abdomen is an important effort to "adjust the heart". And "adjusting the heart" must cooperate with "adjusting the interest rate" to get great results. Therefore, qigong experts have a saying: "To cure diseases, we should nourish qi, and to maintain health, we should adjust our breath.". Breathing will clear the heart, clearing the heart will strengthen the brain, and strengthening the brain will be flat, and there will be no discomfort at the beginning. " It is extremely difficult for beginners to do this kind of kung fu. People's delusions never stop together for a second. This is what I call "spiritually". Is to be able to calm these thoughts down, put down all other thoughts when sitting quietly, and focus on the lower abdomen (lower abdomen). If you want to start again, just let it go. Repeated practice like this, over time, delusions will naturally gradually decrease, in order to reach the realm of no thoughts. This is the best achievement method. For example, beginners of Qigong feel that the foundation of this idea is not enough, so they can close their eyes lightly, show a glimmer of light and look at their noses accurately. This is called "eyes like curtains". Breathe gently through your nose. If you don't smell it, your mouth must be closed naturally and your tongue should be extended to the upper jaw. When you have more oral liquid, you can slowly swallow it in small sips. The most important thing is to defend the abdomen. People who learn to meditate for the first time often reflect: "When I didn't learn to meditate, there were fewer distractions. After I entered meditation, I had more illusions. I don't know why. This is really a misunderstanding. You know, people's paranoia may be discovered at any time, but it is usually distracted by contact with the external environment, so I don't feel much; After Xi sat down quietly, he focused his attention on his heart, only feeling that his hallucinations were flashing and unpredictable. We can start from here and immediately reflect on how delusions come about. Long-term practice will gradually reduce distractions. Beginners of meditation are prone to two situations. First, there is no way to settle down; Second, I feel groggy and doze off from time to time. To cure emotional anxiety, we should completely put down all our thoughts, be empty, and pay attention to the middle of the lower abdomen, and naturally we can slowly settle down; To cure drowsiness, we should raise our minds, pay special attention to the tip of the nose and cheer up. Because of fatigue during the day, it is easy to get dizzy when sitting at night, and get up in the morning to meditate, so I won't get dizzy because I have enough sleep at night. [Editor: Chi Hao] (Zhou Songnan)